It looks like mobile 2D barcodes are starting to catch on in Europe at least. When I was in Japan a couple of years ago they were everywhere, on handbills, maps, business cards, product packaging and in magazines. The idea is that you point a camera phone at a barcode and take a picture. Software in the phone decodes the image and takes you to a mobile website, downloads a ringtone or adds contact information to your phone's address book. … Continue reading →